Title :
Noise of the stretched pulse fiber laser. II. Experiments
Author :
Yu, Charles X. ; Namiki, Shu ; Haus, Hermann A.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., MIT, Cambridge, MA, USA
fDate :
5/1/1997 12:00:00 AM
Abstract :
For pt.I see ibid., p.649, 1997. The noise characteristics of the stretched pulse fiber ring laser are determined from the power spectrum of the current of a detector illuminated by the output pulse train. Amplitude fluctuations as low as 0.05% of the pulse energy and jitter <80 fs (measurement time=0.09 s) are obtained with no external stabilization. These are the lowest noise levels reported to date for a passively mode-locked laser. The experimental results are compared with the noise theory of the companion paper. Good agreement is obtained between theory and experiment. Comparison with theory also shows that the jitter at frequencies higher than 60 Hz is due to amplified spontaneous emission (quantum) fluctuations when the measurement time is on the order of 0.1 s
Keywords :
fibre lasers; fluctuations; high-speed optical techniques; jitter; laser noise; measurement theory; photodetectors; ring lasers; superradiance; 0.09 s; 0.1 s; 80 fs; amplified spontaneous emission; amplitude fluctuations; detector; jitter; lowest noise levels; measurement time; noise characteristics; noise theory; output pulse train; passively mode-locked laser; power spectrum; pulse energy; quantum fluctuations; stretched pulse fiber laser noise; stretched pulse fiber ring laser; Energy measurement; Fiber lasers; Fluctuations; Jitter; Laser noise; Noise level; Optical pulses; Power lasers; Pulse measurements; Ring lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
